18 watts LED track lamp ballast is built-in, or external good search, menswear store with 4000 k is that ok? Seek professional great god advice
Power supply doesn't matter, as long as reasonable structure appearance beautiful, men's clothing with 4000 k color temperature estimation is too warm, the ideal 4500 k
Clothing store, I prefer to look at the color rendering of light source, the higher the color rendering index, to the clothing color reduction degree, the better, the clothes look beautiful.
You send pictures, both are LED oh, is built-in drive oh, on both sides. The rail lamp is external drive and light a body, just have staggered position. Does not affect the use of oh, the first is the COB is currently the latest model of the LED light source, below is high power LED light source. 4000 k was the most natural light color oh. Clothing store with very OK, is to find the LED 4000 k color temperature is a little difficult. Normal color temperature is between 3000 ~ 3200 k.
